Oil burner



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G. D. suNDs'rRAND OIL BURNER Filed May 19, 1924 Oct. 9, 1928.

y and fuel out of the combustion chamber be against defiecting bafiles.

Patentedy Oct. 9, 1928,.

Gus'ru DAVID sUNDsTRND, or nocxroan, ILLINoIaAssIGNon, BY :wenn AssIGN-l 11,637,114 PATENT OFFICE.

MENTS, TO SUNDSTRAND ENGINEERING COMPANY, OF BOCKFORD, ILLINOIS, A

CORPORATION OF ILLINOIS.

lApplication led May '19,

This invention has reference to oil-burning apparatus of the type usedin heating. dwell'- ings, apartment houses, factories, etc., an relatesparticularly to the construction of the parts located within thefurnace.

Ordinarily oil burners having `a combustion bowl and a forced airsupply'thereto introduce the air at a considerable velocity Highvelocity in burners is undesirable since it tends to create Vnoise andto carry, the ail fore completion of combustion.

It is the object of this invention to provide a means and method ofmixing fuel with a forced air supply to assure a quiet and `efiicientcombustion. l

It is anotherobject of this inventioni to provide a structure dividingand distributing the supplied air in a manner to-avoid high velocities.

Another object is to provide a combustion bowl having a central supplyof air thereinto Another object of the invention is the provision of aseries of spaced conical frustumsv4 disposed in the ath of the enteringlair as the deflecting ba es. f p

Still another object is the provision of a fuel nozzle arranged to jspray fuel against` the air leaving the bowl.

In the drawings there is illustrated a structure embodying theinvention, Figure 1 representing the mechanism which is located outsideAthe furnace, and y Fig. 2 illustrating the parts located within thefurnace. Fig. 3 is an enlarged cross-sec-v tion of one of the baiesalong the line 3-3 of Fig. 2..

In the drawings an air blower is provided comprising a casing 5 and afan 6. The blower is associated with suitable mechanism for controllingthe air and fuel supplies, such mechanism forming no part of thisinvention. A conduit 7 leads from the blower to the burner bowl shown inFig. 2. In the present instance the bowl 8 is shown as being circular inform and is horizontally dis posed. The bowl is supported upon an elbow9 which is part of and the termination of the conduit 7. Suitable legs10 support the elbow when required. The top of the elbow 9 has acircular opening, 1n the present instance slightly enlarged over thenormal diameter, t thereby forming the shoulder 11 and annular on.summit.l

1924. Serial No. 714,212.

annular fiange 13 for admission of the air.

Inside the bowl a ring 15 is shown about the bottom opening. The bottom14 slopes slightly upwardly and terminates in a cylindrical wall y16. Inthe bottom of the elbow 9a depression 17 is formed defining a chamber1-8. Y From this-chamber extends a pipe 20 for draining oil from theburner in case of continued supply when there is no combustion. l

In the casingy of the elbow 9 there is supported a vertical stem 21axially alined with the center of the bowl and the bowl-end of theelbow. .For this purpose a supporting v socket 22 is cast into thelelbow to insure a rigid vertical support of the stem 21. The upper endof the stem has a plurality of baflies thereon arranged to covercompletely the air-opening in the bottom of the bowl. Y

The .bafiies are disposed so as to deflect the air entering verticallyto ay substantially horizontal path. lAnd furthermore -a plurality ofbafiies is-provided and arranged to divide the single stream of enteringairinto a number of streams orhorizontal radial sheets of air.

The bafl'les of the drawing are shown as being four in number as 23, 24,25 and 26. Each baffle is a frustum `of a conical ,shell and each issupported by the rod 21 lying in the cone axis. The lowerm'ost frustum23 is the larger, and each frustum in succession has its lower baseoverhanging the upper end or ba/se of the frustum beneath it andvertically spaced above it. For example the frustum 23 has the upper end27 disposed below the lower base 28 of the baille 24, forming thehorizontal space 29 therebetween from which may issue asheet of air.Each of the baffles 23, 24 and 25 is open at its upper and lower ends.A. spider 30 (Fig. 3) is formed in each one and is provided with acentral member-31 for support by a shoulder or reduced portion 32 of thestemV 21. The topmost baille 26 has a closed upper end 33 to serve as acap forthe series and is supported on the end of the stem 21.

In Fig. 2 a nozzle 34 is shown located in line with the stem 21 andspaced above the bafiies. Oil or a mixture of oil and air is sprayedfrom the nozzle in a path generally indicated by numeral 35. The bowl ofthe drawings is inimpinge on the side wall 16. At the walll the airnaturally becomes deflected upwardly thereby tending to form acylindrical shell or envelope above the bowl. But one sheet of air andpart of a second are emitted in a. line above the wall 16. These sheetsbeing weaker in force because of the smaller diameter of the upperbaliles, likewise merge into a horizontal current which tends to spreadout the cylinder of air from the lower baffles, thereby enlarging it totill the space above and laterally outside ot the bowl. The oil beingsprayed into the'path of the air is carried by the laterally travelingsheets, whereby it is well distributed throughout the iurnace'to cause aecient and complete combustion.

While the above type of bowl and bellies produces a mixture of air andfuel in the manner and of the type described, it is within the scope ofthis invention, as defined in the appended claims, to'provide otherstructures to accomplish the same purpose according to the principlesabove set forth.

I claim as my invention:

l: An oil burner having, in combination, an air blower, a burner bowl,an air conduit from aca-mia the blower to the bowl, said conduitentering the bowl axially thereof, a plurality of spaced.

creasing in size away from said opening, the

lower base of one frustum being larger than the upper base of the next.lower frustum, the

uppermost frustum having an imperforate' upper end, supportingm'eans'for said frustums, and a fuel nozzle disposed above saidfrustums.

2. An oil burner having, in combination, a forced air supply, a burnerbowl, an air conduit entering said bowl axially thereof and connected tosaid air supply, a plurality of spaced overlying conical shell frustumscovering the opening of saidconduit, said frustums decreasing in sizeaway from the opening, a cap 4for said frustums, and a fuel nozzledisposed above said cap.

3. A fuel burner having, in combination, a bowl, a supporting elbowtherefor, a forced air supply, a conduit therefor, said elbow being inthe conduit to carry theair, the bowl having an annular bottom with itsopening in register with the elbow opening, ay stem supported axially ofsaid opening, a plurality of cone frustums carried by said stem, and afuel nozzie-disposed, above said frustums.

ln testimony whereof, Il have hereunto at,

lixed my signature.

GUSTAFDAVID SUNDSTRAND.

